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A223663 T(n,k)=Number of nXk 0..3 arrays with row sums unimodal and column sums inverted unimodal 6

%I

%S 4,16,16,50,256,50,130,3060,3060,130,296,29922,141046,29922,296,610,

%T 252912,5285887,5285887,252912,610,1163,1912914,169756788,761845474,

%U 169756788,1912914,1163,2083,13254601,4836834467,93974096640,93974096640

%N T(n,k)=Number of nXk 0..3 arrays with row sums unimodal and column sums inverted unimodal

%C Table starts

%C ....4........16............50..............130...............296

%C ...16.......256..........3060............29922............252912

%C ...50......3060........141046..........5285887.........169756788

%C ..130.....29922.......5285887........761845474.......93974096640

%C ..296....252912.....169756788......93974096640....44626165058452

%C ..610...1912914....4836834467...10253839694278.18744540823704239

%C .1163..13254601..125226945708.1013084819998517

%C .2083..85563043.2997363216275

%C .3544.521069404

%C .5776

%H R. H. Hardin, <a href="/A223663/b223663.txt">Table of n, a(n) for n = 1..59</a>

%e Some solutions for n=3 k=4

%e ..2..0..0..2....2..2..0..0....2..2..0..2....0..0..1..2....2..0..0..0

%e ..0..2..3..0....2..2..3..0....2..0..1..0....3..0..1..2....0..2..1..2

%e ..2..0..2..3....3..2..0..0....0..1..0..2....3..2..1..1....1..0..1..0

%K nonn,tabl

%O 1,1

%A _R. H. Hardin_ Mar 25 2013

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Last modified July 3 08:00 EDT 2022. Contains 355031 sequences. (Running on oeis4.)